Precision optomechanics with a particle in a magneto-gravitational trap
Precision optomechanics with a particle in a magneto-gravitational trap
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DOI：
10.1117/12.2515721
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发表时间：
2019-03
期刊：
影响因子：
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通讯作者：
Walter M. Klahold;C. Lewandowski;P. Nachman;B. Slezak;B. D’Urso
中科院分区：
文献类型：
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作者：
Walter M. Klahold;C. Lewandowski;P. Nachman;B. Slezak;B. D’Urso
悬浮粒子因其与环境的极端隔离而成为精密光学机械的极具吸引力的系统。在这里，我们描述了在磁引力陷阱中进行的几个实验，这些实验使用了抗磁性和地球引力的组合。首先，使用反馈可以将粒子的质心运动冷却到远低于环境温度的温度。其次，粒子在场质量影响下振荡频率的变化可以用来测量牛顿引力常数。最后，报道了产生和捕获可能含有光学寻址缺陷中心的碳化硅微晶的第一步。
Levitated particles are attractive systems for precision optomechanics due to their extreme isolation from their environment. Here we describe several experiments with microparticles in magneto-gravitational traps, which use a combination of diamagnetism and the earth's gravity. First, the center-of-mass motion of the particle can be cooled to temperatures far below the ambient temperature using feedback. Second, the change in the frequency of oscillation of the particle under the influence of field masses can be used to measure the Newtonian gravitational constant. Finally, the fjrst steps towards producing and trapping silicon carbide microcrystals, which may contain optically-addressable defect centers, are reported.